Apparatus and Method for Operating Wearable Device

2. The method of claim 1, wherein the plurality of operation modes further comprise an announcement mode representing for a detection of an announcement from an external sound source.

3. The method of claim 2, wherein the determining the operation mode from among the plurality of operation modes comprises determining the announcement mode to be the operation mode of the wearable device, based on determining that an announcement signature is detected from the received input.

4. The method of claim 2, wherein the determining the operation mode from among the plurality of operation modes comprises determining the power control mode to be the operation mode of the wearable device, based on determining that a magnitude of the received input is less than a threshold.

6. The method of claim 1, wherein the preset operation further comprises, based on the determining that the detected voice signature matches with the pre-stored voice signature, updating the pre-stored voice signature based on the detected voice signature.

9. The wearable device of claim 8, wherein the plurality of operation modes further comprise an announcement mode representing for a detection of an announcement from an external sound source.

10. The wearable device of claim 9, wherein the at least one processor is configured to execute the one or more instructions to determine the announcement mode to be the operation mode of the wearable device, based on determining that an announcement signature is detected from the received input.

11. The wearable device of claim 9, wherein the at least one processor is configured to execute the one or more instructions to determine the power control mode to be the operation mode of the wearable device, based on determining that a magnitude of the received input is less than a threshold.

13. The wearable device of claim 8, wherein the preset operation comprises, based on the determining that the detected voice signature matches with the pre-stored voice signature, updating the pre-stored voice signature based on the detected voice signature.